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A130916 as a simple table

na(n)
11
22
33
44
55
66
78
88
99
1010
1112
1212
1315
1415
1515
1616
1718
1818
1920
2020
2124
2224
2324
2424
2525
2627
2727
2830
2930
3030
3132
3232
3336
3436
3536
3636
3740
3840
3940
4040
4145
4245
4345
4445
4545
4648
4748
4848
4950
5050
5154
5254
5354
5454
5560
5660
5760
5860
5960
6060
6164
6264
6364
6464
6572
6672
6772
6872
6972

[1,2,3,4,5,6,8,8,9,10,12,12,15,15,15,16,18,18,20,
 20,24,24,24,24,25,27,27,30,30,30,32,32,36,36,36,
 36,40,40,40,40,45,45,45,45,45,48,48,48,50,50,54,
 54,54,54,60,60,60,60,60,60,64,64,64,64,72,72,72,
 72,72]